Keep a spray bottle of water handy.
I have never ironed sheets. I no longer put them in the dryer. They are much softer air dried, and they last longer too. Dryers bake in any missed food, goo, or blood. Dryers super heat the fibers and wrinkle everything. Don't use sofeners because they have ingredients that are carcinogenic. Sheets that are air-dried don't need them.
Best to use detergents with hypoallergenic qualities and no fragrance, since one doesn't know whether guests might be allergic to perfumes, etc.
I hang sheets on "octopus-type hangers" from IKEA from my backporch, tippytoes up to hook rings on outdoor roof rafters (1909 house with low hanging eves). If one gently pulls on and stretches seam edges while damp, the wrinkling and creases come out of them as they dry. Stretch pillowcases diagonally as well. Pull the top sheet's front face seam in the same way, and hang to dry. Southern California sunlight is super! Indoors works too. The hangers can be brought inside at dusk and hung from shower curtain or loft bed framing to finish drying. We can always use the humidity inside.
Folding sheets after drying is key to not having to use an iron. (Or don't fold them...use them on the bed right away...) If you must fold, start with the top sheet's front margin and keep it flat, fold facing itself and smooth out the creases as you fold smaller. The stored folded sheet busts it's own wrinkles over time.
When making the bed, if the top sheet, (while turning it down over the blanket), is wrinkled (usually due to your folding process - hey, it's a work of art!...or due to your dryer...), use a spray bottle of water to smooth the top sheet margin, or pillowcase edge. It'll usually dry just fine before the next guest arrives. I'd rather plug in a hair dryer than an iron, when in a hurry.
This drying method works with your clothes too. Hang a wet shirt, for example, pull on and stretch the arms to smooth and "size" it, same with collar, front placard and seams.
Supply facial wipes for guests so that everyone is encouraged to use them. That's much easier for tired guests than using a washcloth.